* {
    margin: 0;
    padding: 0;
    color: black;
    font-size: 48px;
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
}

body {
    width: 100%;
    height: 100%;
    background: #10769e;
    background-color: linear-gradient(90deg,rgba(16, 118, 158, 1) 1%, rgba(49, 232, 220, 1) 64%, rgba(7, 78, 166, 1) 100%);
}

.cisco-link {
    padding: 80px 180px 80px 180px;
    position: absolute;
    border: 2px solid black;
    left: 150px;
    top: 350px;
    background-color: #286b94;
    text-decoration: none;
    text-align: center;
    justify-content: center;
    transition: 0.5s;
}

.cisco-link:hover {
    transition: 0.5s;
    background-color: #cfc5a9;
    box-shadow: 6px 10px 10px 2px #474745;
    top: 340px;
}

.linux-link {
    padding: 80px 180px 80px 180px;
    position: absolute;
    border: 2px solid black;
    left: 700px;
    top: 350px;
    text-decoration: none;
    text-align: center;
    background-color: #286b94;
    transition: 0.5s;
}

.linux-link:hover {
    transition: 0.5s;
    background-color: #cfc5a9;
    box-shadow: 6px 10px 10px 2px #474745;
    top: 340px;
}

.windows-link {
    padding: 80px 180px 80px 180px;
    position: absolute;
    border: 2px solid black;
    left: 1250px;
    top: 350px;
    text-decoration: none;
    text-align: center;
    background-color: #286b94;
    transition: 0.5s;
}

.windows-link:hover {
    transition: 0.5s;
    background-color: #cfc5a9;
    box-shadow: 6px 10px 10px 2px #474745;
    top: 340px;
}